Dave,
Are you saying that this problem does not occur if you are not
simultaneously running the file manager?
When you completely lose control of even being able to shut down a
computer, I consider that crashing the OS, even if it is only causing
total loss of control of the video. Even so, I
The West Mountain interface, like most things they sell, tend to be some
expensive but it is such a convenient form factor and eliminates the
typical USB to COM serial adapter. Time Wave has a similar design at a
similar price.
I have made a basic discrete transistor interface that you often
I was on 30 meters last night up in the automatic subband just above
10.140 (dial frequency 10.140 to 10.141 USB + audio), and I did hear a
number of stations, particularly K3MQ. I did copy KB9UMT but was
difficult to get the entire call for sure, due to quite a few hits, but
based on reading
Hi Don,
I am glad to see a specific frequency for 30 meters. When I have called
CQ though it was usually at 10.133 dial frequency + 1500 Hz.
The reason for my choice of frequency is to avoid the 10.140 to 10.150
automatic sub band where you can expect to be QRMed by Pactor stations
that can
It would be difficult to pause without notice with DV due to the latency
issue. This is one of the reasons that I do not expect DV to ever become
all that popular on HF. And if there are attempts to improve the
sensitivity and robustness, the latency would have to become even more
noticeable
Here in the northern midwest U.S., we have a great deal of QRN that
begins in the early evening. It is not always easy to maintain
comfortable analog voice communications with 100 watt stations during
the summer months.
When you use 160 what power levels are you running in order to keep the
Philip Leonard WVØT wrote:
Does anyone run 100wpm ASCII RTY anymore.
The story of ASCII operation on HF is interesting because it was one of
those issues where there was a strong desire by some hams to have this
capability back when we could only use 5 level code such as RTTY. If we
could run
I tried making a connect recently but did not hear anything back so
assumed there was no propagation. I will try again later on tonight.
When I ran my tests with the local station on 160 meters, the mode did
not perform well at all compared to other modes. If you look at Patrick,
F6CTE's
I appreciate the further information from both Ralph, ZL1TBG and John,
VE5MU.
PSK125 would not be a very robust mode compared with most other digital
modes, due to the high baud rate and no FEC.
It seems from John's comments that although 141A is not quite as fast,
it is more robust than
Ralph,
Could you be a bit more specific when you say that you are having good
results?
How does RFSM2400 compare with other digital modes, particularly in
terms of weak signal performance? And also with high noise levels such
as on the lower bands?
Although I don't have any convenient way
Considering the number of years I have supported ARES/RACES and Skywarn,
most of the value of amateur radio has been with Skywarn. Yes, we were
heavily involved with the flood of 1965 in the upper Midwest U.S., but
nothing like that since due to infrastructure improvements.
With cellphones
It does not seem that 141A is all that robust. Of course it is better
than 300 baud packet so you might be able to use it for daytime
communications, but it seems to fail with moderate QRN on the lower
bands that you would use for NVIS type local communication.
For those of you who use Pactor
It was my understanding that they converted the GWEN (Ground Wave
Emergency Network) system over to create the Differential GPS signal.
Those frequencies were in the 285-325 kHz LF band. Perhaps they have
additional ones in the MF bands?
For those who are not familiar with GWEN, this was a
John,
While I agree with you that we should be allowed to mix voice and ASCII
text (primarily for emergency communications use), what makes you think
we can use voice in the 7075 to 7100 here in the U.S.?
73,
Rick, KV9U
John B. Stephensen wrote:
WinDRM and HamDRM are good examples of modes
Are there hams in countries who are not in your so-called technology
jail, who are using ultra wide bandwidth HF modes?
What other HF modes are being used or proposed that we can not use here
in the U.S. that require changes to our regulations?
73,
Rick, KV9U
expeditionradio wrote:
It
It sounds like some recurring data tx, perhaps some kind of telemetry? I
also hear similar signals at 1727 kHz and 1767 kHz.
The 1767 signal is quite strong here in SW Wisconsin, at around 10 over
S9 or 100 microvolts on my rig with a homebrew quarter wave very low L
averaging 15 feet high and
After all the claims of how we are somehow being held back from new
technologies, it is interesting that there is nothing but silence from
the folks who claim so many others can do all these new things that we
supposedly can not here in the U.S. I am hopeful we have some honesty
about this in
The petition was primarily intended to restrict modes based upon
bandwidth. Looking at this from an HF perspective, I used to think this
was a good compromise to take, and even thought of myself as being
progressive for supporting this approach. After listening to those
who have experienced
Although a minor part of my discussion, one must not forget that radio
signals, particularly on HF have no boundaries and affect others outside
of a political jurisdiction.
Whatever the FCC decides here in the U.S. has effects on the rest of the
world, sometimes profoundly so. Particularly
As one who has probably had the most classes in my area to bring in new
hams over several decades, there is no question that the new entrants
tend to not be near as motivated as we once had. That is because it
brings in a larger number of those who have more of a superficial
interest. When no
I had mentioned cross platform development recently and wondered if Mono
could easily do the porting. It is not something that just happens, but
based upon the results of some competition, it does look like this is
doable:
http://blogs.zdnet.com/open-source/?p=1022
73,
Rick, KV9U
If one does a web search you find a lot of comments about encryption and
amateur radio. But they mostly seem to come from one source. You and
your group. Just because you are doing something that may be illegal or
at least very borderline sub rosa type of activity does not mean that
the rest
What I would like to see developed is a MS OS version of PSKmail so that
this technology could be used to a greater degree here in the U.S. Linux
adoption is very low yet and probably will be this way for many years in
this part of the world.
Automatic operation has been with us for many years
As a former user of ARQ Amtor, Pactor I and Clover II many years ago,
including using the Aplink system and later the Winlink System (mostly
with Clover II), I found these systems to be limited, but of some
practical value since there was no internet back then and you could have
traffic
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